Induction-coil for igniting explosion-motors.



BEST AVAILABLE COP\ J. OARPBNTIER INDUCTION COIL FOR IGNITING EXPLOSION MOTORS APPLICATION FILE}? FEB. 8.1905.

PATENTBD OCT. 3, 1905.

4 SHEETS-SHEET l.

BEST AVAlLABLE COP PATENTED 0GT.3,1905.

- I J. GARPENTIER. INDUCTION GOIL FOR IGNII'ING EXPLOSION MOTORS.

APPLICATION FILED FEB. 8.1905.

. 4 SHEETS-SHEET 2.

ITER ITEM/ML MUTATOR' TERMINAL j mire/aural? WITNESSES BEST AVAiLABLE CO?" No. 800,625. PATENTBD 001*. s, 1905.

- J. OARPENTIER. INDUCTION COIL FOR IGNITING EXPLOSION MOTORS.

APZLIOATIOH FILED FEE. 53.19%.

4 SHEETS-SHEET s.

BEST AVAlLABi- C BATENTED OCT. 3, 190 5 Y J. CARPENTER.

INDUCTION 0011. FOR IGNITING EXPLOSION MOTORS.-

APPLICATION FILED r113. 8.1905.

SHEETS-SHEET 4 BEST AVAlLABLE COP:

. UNITED STATES EATENT GEE-ICE.

JULESCABPENTIER, OF PARIS, reason.

" INDUCTION OCiIL FOR IGNITING ExPLosioN-moToRs.

To all whom it may concern.-

it known that I JfiLEsCARPENTIER a Specification of Letters Patent Application and February 8,1905. Serial no. 244.757.

citizen of the Republic of France, residing-1n Paris, France; have invented certain new and useful Improvements in Induction-Coils for Igniting Explosion-Motors, of which the following is a specification.

. This invention has for its object an arrange-- ment serving to modify the action of the interrupters of ind action-coils and to allow them to produce'in these coils. inparticularv when they are employed for igniting explosion-motors, a

"single spark per contact with the distributer.

' Th'e'advautage'which this condition presents is these sparks being suificient easily understood. 7 In effect, the duration of the contact at the distributer, which is variable with the speed of the motor, is rather considerable at low speeds and then corresponds to the emission in a coil with ordinary interrupter of a seriesof sparks, the first-of for effecting the ignition'of the mixture. The others areuselessand cause an unnecessary expenditure of electricity. The possibility of only emitting one spark per contact at the distributer therefore admits the realization of a saving which is ofimportance when the source of electricity consists of batteries or accumulators. The invention in question only introduces into the construction of the coils an insignificant complication and reduces itself in principle to the.

use at the extremity of the core next the interrupter of a fiat solenoid of thin wire. This' solenoid when, the distributer sends a current into the primary of the'coil receives a shunt of this current and contributes to the magnetization of the'core; but while under the influence of this magnetization-and by the ac- 'tion of the known devices of the interrupter is itself broken.

the primary current is suddenly broken the small shunt-current produced in the solenoid subsist's and in maintaining a slight magnetization in the core retains the movable armature until the moment when by thecessation of the contact at the distributer the current The parts of the interrupter then retui'n to their initial position and the apparatus is ready to recommence. In the succession of the phases that have been enu-.

merated there will have been produced, as will be readily conceived, only a single indnced current arid a single spark, whiehis the result aimed at.

The action of the device, it will be seen, is

based upon the permanence of a small shuntvcurrent in the auxiliary solenoid during ,the

Patented Oct. .3, 1905.

entire ccintact at the distributor, It should here be observed that this shunt-current is of such weakiintensity as to correspond to a perfectly negligible expenditure.

Instead of utilizing the core of the coil for actuating the interrupter recourse is'sometimes had to an auxiliary electromagnet. The invention is obviously also applicable in this case. It suffices to provide this electromagnet with two windings, one of thick wire, whichis in series with the primary of the coil, and the otherof thin wire, which is connected in shunt. The action of the interrupter is evidently the same as in the first arrangement.

The accompanying drawings .show two applications of the system.

Figures 1 and 2 are respectively a longitudinal section of a simple induction-coil and an end View thereof, the wooden casing being in section in both the figures. Fig. 3 is a side view of a commutator. Fig. 4 is a diagram of the circuits in the coil. Fig. 5 is a verticalisection, and Fig. 6 a plan, of a type of coil used with an engine having more cylinders than one. 7 is a diagram of the wiring of Figs. 5 and 6. Fig. 8 is a diagram illustrating a slight modification.

The induction-coil consists, essentially, of a primary winding a, of a secondary winding 1), and of a bundle or bar of soft iron 0. The whole'is placed in a wood casing (Z and suitably insulated. At the upper partis arranged the auxiliary coil 0 of fine wire, connected in shunt to the primary current. The said coil surrounds the upper end of the soft-iron bar 0, which projects from the inductioncoil proper, and it is contained in a wooden plate f, constituting a cover. Upon the latter is fixed, by means of two screw-contacts z y, the improved movable vibrating interrupter it. This vibrating interrupter is furnished with a plate having aperiodic oscillations and is designed to be easily dismounted to regiilate' it or to replace it. It is composed chiefly of the additional platen, having aperiodic oscillation, a spring-terminal :r, and a contactscrew 11 These different' parts are mounted on a bridge 0', of suitable metal, fastened immovably on the rectangular frame inclosing the induction coil or coils by means of .two

screws g g, which pass through the screws 12 12', the latter being screwed into blocks q (1, on which the bridged rests. The screws 1 y engage the respective terminals j j, connected to the extremities of the primary coil. The screws g g-are engaged, respectively, in

BEST AVAlLAB LE CGPi sockets connected to the ends of the [iiimary winding. It is necessary here to describe an accessory device of thisxinduction coil, the utility of which is very appreciable.

It is a commutator so arranged as either to' arrest the action of the coil or to -cause-theinterrupter to act as trembler or to cause it to perform a single stroke. This commutatoris constituted as followszc: Upon a lateral- ."woo'den plate 1:, closing the casing containing thecoil, are arranged'two contact-tongues Z m,', secured "by screws. Below the said tongues" there is mounted upon a plate a, a semicircuin disk 0, havingits center at p, This disk.

carriesastud q, which is'engaged in the notch of a projection 1- of a circular plate s with a rib't serving as handle. This plate a isengeged ina circular groove formed in the wood (lot-the casing and is covered by an external ringm. In-seizing withthe fingers-the rib t rotatiOnof the plate x can .be effected, thereby the semidisk can be placed in one .of the three'positions shown on the diagram .f'fiiigj 4. On this diagrarh'the same letters-of =-:"which;ha ve beeu jabove described. In 'addi thefscr'vi-term open, condition ofjrestg In the right-hand position reference designate the same parts of. the coil mi t the battery, D. that of in Wayne E thatof the igniter.

whi'ch corresponds to the the disk-ig-ois-only in-contact. with the'left hand t n ue-1,] The current of the battery therefore-*onlypasses through the primary ,circuit andtlie vibrating interrupter operates, but caugive several sparks p'er stroke, because the shuntjcircuit of the auxiliary coil eis'open. '-'In. the'left hand position the disk 0 is in con-- tactfwith both thetonguesl 5/1.. The batterycurrent then passes into the primary circuit wof-thecoil and-into the shunt-circuit of the auxiliarycoil e; The tongue 0 is then not only. attracted: by the core of soft iron 0 and breaks the primary circuit'in striking upon 7 theclosing-spring l7, but itis also held in its attracted position by the magnetization of the core c,..due to the shunt-current passing throughthefauxiliary coil e, while the contact be ween the cam and the contact-piece of the dis ributer takes place. In this case there can onlybe produced a single ind notion-spark,

becausethere has only'been a single interrup tion of the primary current.

When, instead of only having a single-cylinder moto'r, a motor withseveral cylinders is 'p-u sed and 115183110!) desired tcdistribute the inducedcurrent; there are employed for the igni- 6 tion'fscveral fcoils, (two, three, four, according to the number of the cylinders),;which are generally contained in one and the same cas-- hese 'coils can either ber?erated by separated :inter'rupters or by a s ngle' interrupter. "1n the lattercase the interrupter is attracted by an electromagnetlin which may attery; B the. distributer, O.

.' 'on the primary circuit-is be employed the two windings hereinbefore' described. a. ,Figs. 5 and 6 shows. ,double coil provided rial electromagnet with double winding; '1. -said double coil comprises twoinduction-co' a'- and a, arranged-horizontally, Atthe' lip-" per part, upon: a wooden plate 6', closing the "casing containing thecoils, is fixed an-elec tromagnet'with two branches a, carrying' on the one-branch athickewire winding 12', Fig. 7 and the shunt-winding 'e. The'action' of this double coil will be readily understood": from the. following description of the dia-:.

gram -Fig.';. 7, which corresponds to a quadru plecoil,as the'action 'is exactly the same in bothcases. On this diagram the four inductiotircoils do a a are connected in parallel upon the battery-circuit, and f f f f are the screw-posts which connect'them;:to, the "springs or contact-pieces of theQdiStribut'er l P F Zfof the primary c'urrent. g is the distributing-cam, and h islthe battery or source of 'the'primary current; All the'thick-wire windings of the coils areconnected to the commutator i by a single wire 7 and the tongues k and l of the comxnutator arc respectively connected with the thick-wire windings d and the thin-wire sh'uut-windingse of the electro- 1 magnet c'.- The action of" this arrangementtakes place asfollows': "When the priinary current is sent-by the distributer into one of the'four coils, the primary current arrives in the electromagnet c', which causes the rup mi of the circuit. The shuntwindingef then keeps theinterrupting-tongue attracted, as in the case of a single coil, 'solong as the cam g of the distributer is in contact with the corresponding 'con tactrpiece I. There is 'thus obtained-a single spark, onthe condition, of course, that" the commutator '1' is suitably Onthe modified diagram Fig. 8 instead of the electromagnct 0" having its two windings d and re placed uponone and the same branch the said windings are each placed upon one of the branches'of the electromagnet. As in all induction-coil ignitingapparatus, aco'ndenser m is arranged .ain shunt of the terminalsof the interrupten-Figs. 7 and 8. A suitable "5 space is reservedifor this purpose in the casing of the coils-such 'as at y, for example, in Figs.1and 5. Having thus described the nature of this invention and the best means I know of carry-' 1. In'an induction coil, the combinationwith the armature of the interrupter ofan electromaguet having two windings servin to operate thearmature, the one winding ing of thick"wire'an'd-heingadaptedjto have the main current; through it, while-th other 'windingi's oflthin'wire and bass shunt 4 of the main current passed throughit, sub

with a singleiinterrupter 'atuatedby a speg ing thesame into practical effect, I claim; I

800,825 BESTAVAILABLE COP, 3

. '-2. In,,an induction-coil the combination In witness whereof I have hereunto signed w'lph the armature of the interrupter ef acoil my name in the presence of two subscrbing IO offthin wire surrounding the core of the inwitnesses. V eduption-coil and connected in shunt to the pri- J U LES CA RPENT] mary current, operating so as to keep the arature attracted during the continuance of Witnesses: the distribnt'ere ontact, substantially as de-' 'JULEs ARMENGAUD,

.51? HANSON (J. Coxe. 

